Suction device for particles during machining processing of track rails

Abstract

A suction device includes a plurality of radial fans. Each respective radial fan has a suction opening for drawing in particles that are removed during processing, and an outlet opening for discharging the particles into a collection device. Each radial fan has a fan wheel driven in a rotationally movable manner about a rotation axis. The fan wheel has a circumferential face and an impact face. The impact face faces the suction opening for radially redirecting the particles that strike the impact face. The suction device further includes at least one collection channel circumferentially and partially surrounding the fan wheel of each respective radial fan. The circumferential faces of the fan wheels of adjacent radial fans delimit a roller gap. The collection channel opens in the roller gap.

1 . A suction device comprising:
 a plurality of radial fans, wherein each respective radial fan has a suction opening for drawing in particles that are removed during processing, and an outlet opening for discharging the particles into a collection device, and wherein each radial fan has a fan wheel driven in a rotationally movable manner about a rotation axis, the fan wheel has a circumferential face and an impact face, the impact face faces the suction opening for radially redirecting the particles that strike the impact face; and   at least one collection channel circumferentially and partially surrounding the fan wheel of each respective radial fan, wherein the circumferential faces of the fan wheels of adjacent radial fans delimit a roller gap, and wherein the collection channel opens in the roller gap.   
     
     
         2 . The suction device according to  claim 1 , a cross sectional surface-area of the collection channel decreases continuously in a flow direction. 
     
     
         3 . The suction device according to  claim 1 , wherein the circumferential face of the fan wheel is formed by a covering face of the fan wheel that is a rotationally symmetrical. 
     
     
         4 . The suction device according to  claim 1 , wherein the collection channel encloses, at least in a region adjacent to the roller gap, the circumferential face, the impact face, and/or a rear side, in a limiting manner with a small gap. 
     
     
         5 . The suction device according to  claim 1 , wherein the collection channel opens tangentially in the roller gap between the fan wheels of adjacent radial fans. 
     
     
         6 . The suction device according to  claim 1 , wherein the size of the roller gap is adjustable. 
     
     
         7 . The suction device according to  claim 1 , wherein the circumferential has groove-like or channel-like parallel recesses. 
     
     
         8 . The suction device according to  claim 1 , wherein the circumferential face has, in a circumferential direction, a cyclically increasing and decreasing contour that engages a corresponding contour of the circumferential face of the adjacent fan wheel. 
     
     
         9 . A processing unit for machining processing of a track rail for rail vehicles, the processing unit having a suction device according to  claim 1 . 
     
     
         10 . A rail vehicle having a processing unit which has a suction device for machining processing according to  claim 1 .